H22 Mr. A. H. Cooke on Testaceous Mollusca 



No two specimens are perfectly alike. 



The characters insisted upon by Dr. Strauch as distin- 

 guishing E. Iheringii from E. lemniscatus are the following : — 

 In the latter the snout is narrower and three black bands run 

 along the back, the outer ones being separated from the 

 black colour of the ventral shields. In the former the snout 

 is remarkably broad and rounded, and the head is much 

 depressed and even longitudinally grooved on its upper sur- 

 face ; the median black dorsal band is absent, and the black 

 of the ventrals extends to the flanks. Now we may take 

 specimens b and f (so lettered also on the Plate) as the 

 extreme forms, representing E. lemniscatus and E. Iheringii 

 respectively ; however, in the latter the head is neither so 

 strongly depressed as observed by Dr. Strauch, nor longitu- 

 dinally grooved. The differences between these two speci- 

 mens are considerable, but are bridged over by the others — 

 specimen a with the typical coloration and the broad rounded 

 snout ; e with the black vertebral band, but without the light 

 band separating the ventrals from the latero-dorsal ones ; g 

 lacking the former, and with distinct indication of the latter. 

 To another variety, not noticed before, belongs specimen h ; 

 the scales between the black dorsal bands are not yellowish 

 (or red), but greyish brown, each with a small crescentic 

 black marking, and the light collar is absent. 



In concluding I must also remark that there is no more 

 ground for separating E. reticulatus of Peters from E. lemnis- 

 catus. The type specimen of the latter species, described by 

 Dumeril, must be anomalous if really possessing a simple 

 anal, for all the eight specimens in the British Museum, as 

 well as those examined by Jan, have that shield divided. 



XXVII. — Report on the Testaceous Mollusca obtained during a 

 Dredging-excursion in the Gulf of Suez in the Months of 

 February and March 1869. By ROBERT MacAndrew. — 

 Republished, with Additions and Corrections, by Alfred 

 Hands Cooke, M.A., Curator in Zoology, Museum of 

 Zoology and Comparative Anatomy, Cambridge. — Part I. 



The following Catalogue is a revision of the above " Report," 

 which appeared in the Ann. & Mag. Nat. Hist, for December 

 1870. In 1873 Mr. MacAndrew died, bequeathing all his 

 collections to the University of Cambridge, and it has fallen 

 to my lot to work through and arrange them. I have been 

 induced to pay particular attention to these Suez shells, which 

 have always been kept in drawers quite by themselves, because 



