1865. ] OF MOLLUSKS FROM MAZATLAN. 269 
Cape St. Lucas shells in the, ‘Annals Nat. E[ist.’ 1864, and in the 
Report, pp. 616-626 *. 
704. CeLLepora AREOLATA, Busk+. 
Tablet 2540 contains a specimen on Omphalius ligulatus. 
705. MemBRANIPORA ?FLEMINGII, Buskt. 
Tablet 2541 contains a group on O. ligulatus. 
* The following additional specimens from the Reigen Collection have been 
presented to the British Museum :— 
Tablet. 
- 12%. A group on Omphalius ligulatus. 
13*. Lepralia adpressa and Membranipora, sp. ind., on ditto. 
2. Young opposite valve of ?Solecurtus; perhaps conspecific. 
201*. Four young valves (smallest ‘05 by 034) probably of this species. 
266*. Minute transparent valve, ‘028 across, teeth unformed; perhaps of 
this species. 
308*. Two specimens; margin irregular. 
d94*, Several specimens in Uvanilla unguis; one, not haying room within, has 
made a case for itself outside the Uvanidla. 
642%, A pair, -3 by ‘15; probably an older state of the same species, Barbatia 
alternata. 
60*. A minute, transparent valve, -045 by -024, without teeth ; resembling 
2 Savicava fragilis, Nyst,’” Jeffr., in ‘ Ann. Nat. Hist.,’ Aug. 1858. 
486*. A young shell, ‘06 across, laid open; crowded inside, especially near the 
umbones, with a pinkish mass of young ones, about ‘0018 in length. 
500, A younger pair, much more transverse, transparent, without concentric 
ridges, the lateral teeth in one valve being simply the raising of the 
dorsal margins. 
833*. Two young specimens, nestling among Nullipore on Fisswrelia alba. 
869*. Two specimens, with egg-cases arranged in pattern like Orbitolites. 
876*. One specimen, curiously mended after fracture. 
877*. One specimen, with columella curiously contorted. 
1023*, One specimen, with ribs rounded and aspect of Siphonaria lecanium ; 
probably a distinct species. 
1058*. One young specimen, probably conspecific, though only 07 by ‘047; 
there is no trace of spire. 
1059*. Three specimens; broad form. 
1468*, Fragment of Spondylus calcifer, with basal supports of Hipponyx ?ser- 
ratus, in burrow of Lithophagus plumula. 
1795*. Two specimens with five intercalary teeth. 
1834*. One specimen with the canal bent back, as in Cassidaria. 
2221%*, One specimen, mended after severe fracture. 
2223*, One specimen; columellar fold bifid. 
2224*, Two specimens; columella bent and straight. 
2225*, One specimen; labrum thin. 
2226*. One specimen ; ribs close. 
2376*. One specimen, dwarf form; nodulous, as in N. nodulifera, Phil. 
2516. An opposite larger valve, since found, in which there is only one distinct 
posterior tooth, and the anterior hooked tooth is separating into two, 
[2534. One specimen of Vitrinella ? tricarinata, jun., of which the ribs are 
nodulous in the young state. If rightly determined, this adds no. 710 
to the list of species. | 
2536. A nuclear shell, ‘046 across, of Naticoid shape, very finely striated in each 
direction. It is probably a young Hipponyz. 
+ Both of these species were kindly identified by Mr. G. Busk. > 
