1865.] OF MOLLUSKS FROM MAZATLAN, 273 
vatis, suturis valde impressis ; basi prolongata, obtusa ; aper- 
tura ovali, postice angusta; labro acuto; labio tenuissimo, 
Long. *105, long. spir. ‘068, lat. ‘033; div. 20°. 
= Leiostraca ?recta, Maz. Cat. in loco: non C. B. Ad. 
551, LetosTrRaca PRODUCTA, 0. sp. 
L. t. parva, albida, subfusiformi, marginibus spire rectis; vertice 
acutiore, recto; anfr. norm. ix., planatis, suturis vix conspi- 
cuis ; peripheria satis rotundata ; basi rapide angustata, postea 
producta ; apertura subrhomboidea, axi antice acuta, angulata; 
labro acuto; labio tenui. 
Long. +123, long. spir. 08, lat. °046; div. 23°. ; 
= Leiostraca ? solitaria, Maz. Cat., in loco: non C. B. Ad. 
This species is easily recognized by its very-peculiar sharply- 
pointed beak ; in shape like a young Jostellaria, without the canal. 
652. ANACHIS THZNIATA, Phil. 
Columbella teniata, Phil. in Zeit. f. Mal. 1846, no. 26 (non Ad. 
& Rve. in Voy. Samarang). 
= Anachis Gaskoini, Cpr. in Maz. Cat. p. 510. no. 652. 
Variat lineis spiralibus fuscis viii., quarum iii. in spira mon- 
strantur; maculis alternatis inter secundam et tertiam sttis. 
Variat quoque maculis evanescentibus. 
Hab. Callao (teste Gaskoin) ; Mazatlan (EF. B. Philippi, Reigen); 
Cape St. Lucas (Xantus). 
It appears that Mr. Gaskoin was not acquainted with Phi- 
lippi’s species, which had not then reached the Cumingian Collec- 
tion; as he pronounced M. Reigen’s specimen to be new, and sug- 
gested the specific name in the Mazatlan Catalogue. It would have 
avoided a double synonymy, could the name teniata have been re- 
tained for the Samarang shell, and Mr. Gaskoin’s for this. The 
Cape St. Lucas shells vary as above indicated. 
650. 7ANACHIS SERRATA, Cpr. 
Maz. Cat. no. 650, p. 509. Perfect specimens of this singular 
species having been found at Cape St. Lucas by Mr. Xantus, the 
diagnosis may be thus completed :— 
Epidermide fimbriata, lirulas spirales eleganter decussante ; labri 
denticulis variantibus, interdum subobsoletis. 
Long. *28, long. spir. 15, lat.-13; div. 40°. 
With the sculpture and general aspect of a small Cantharus, it has 
the mouth of an Anachis. The operculum, and therefore the generic 
relations, are not yet known*, 
* The following additions and corrections may be useful to the students of 
the British Museum Catalogue :— ; 
Species 181. Arca multicostata further differs from A. grandis in the epi- 
dermis being soft and very finely hairy. 
Proc. Zoou. Soc.—1865, No. XVIII. 
