EIGENMANN!: PIMELODELLA AND TYPHLOBAGRUS 239 
lower lobe. In the largest specimens it extends a little beyond the base of the 
anal. The pectoral spine in the smallest has 9 spines on half of the length, 12 in 
the next in size, 15 in the next (125 mm.), 24 on the largest on all but the distal 
fourth of the spine. The lateral band extends from snout to caudal. The back 
is similar in color to the band, the space between the back and the lateral band 
being lighter in color. In the most highly developed the upper caudal lobe is 
2.5 in the length; the distance between snout and dorsal fulcrum 3.4 in the length. 
SprcIMENS EXAMINED. 
| i ss | 
Length in Location. Date. Collector. 
Catalogue Number. Mn 
6941a C. M.....| 100 Villa Bella, Amazon Oct. 5, 1909 Haseman 
6942a—b C. M... 74-103 | San Joaquin, Bolivia Sept. 4,1909 | Haseman 
6943a C. M..... UG | Asuncion, Rio Paraguay Mar. 29, 1909 | Haseman 
6944a-f C. M. .. 58-135 | Corumba, Paraguay Basin Apr. 28, May 2, 
| 1909 | Haseman 
6945a-g C. M... 35-110 | Rio Jauru, Paraguay Basin June 2, 4, 1909 | Haseman 
6946a-e C. M... 75-110 | San Luiz de Caceres, Paraguay Basin | May 24, 1909 | Haseman 
6947a-h C. M...| 82-180 | Villa Hays, Rio Paraguay Apr. 13,1909 | Haseman 
10133a I. U. M..| About 70) Corumba | Anisits 
10792a I. U. M..| About 160) Parana, Entre Rios von Ihering 
10200a I. U. M..) About 170) Laguna Ypagarai, Paraguay Anisits 
696la-bC.M....| 67-68 | Arequa, Paraguay April 8, 1908 | Haseman 
6935a-71 C.M....| 55-140 | Uruguayana Feb. 5 and7,1909, Haseman 
6939a C.M..... 100 /Rio Paranahyba (into Parana) at | Aug. 14, 1908 Haseman 
| bridge to Goyaz 
The size of the pectoral teeth varies greatly with the locality, the maxillary 
barbel to a less extent. In 6939, 100 mm. long, it extends about to the end of 
the base of the anal. 
Only one of the twelve specimens recorded by E. & E. from Goyaz (8196 
M. C. Z.) is still extant. I am in doubt whether we were correct in referring it to 
P. gracilis. The caudal is broken off near the base so that it cannot be determined 
whether it possesses one of the most characteristic features of the species, the 
prolonged upper caudal lobe. The maxillary barbel extends only to near the 
tip of the ventrals and is therefore much shorter than in typical specimens of 
P. gracilis. The eye is smaller than in the average given for the twelve specimens 
by E. & E., otherwise their description holds. The pectoral spines measured 
from above average slightly longer than the snout and eye. The dorsal spine is 
slightly less in length than the snout and eye; it is smooth in front and only very 
slightly roughened behind. The pectoral spine has nineteen thorns, the longest 
one being one third the width of the spine. 
A large series of similarly preserved specimens are necessary to properly 
define this and the preceding species, if the two are really different. 
